Okay,
I'll half explain this, because the data probably isn't in the program. whatever.
Weight distribution plays a key factor in over time stability of the disc.
This is MVP's big deal. Whatever the percentage is. I lost the articles and the guy who wrote them. but from memory, it was like 18% more weight to the rim on MVP.
Couple factors here.
Ripums on an object with a mass on the outside are far harder to create, vs inside.
Good ripums on a high rim rated disc with speed will produce a longer flight as the disc is able to maintain stability in flight for longer periods before succumbing to turbulence and stalling or whatever particular thing happens to the disc.
The spin of the disc is critical in the disc maintaining a stable flight and fighting against the turbulence and flow of the air.
This is why max weight discs generally fight wind better.
But you can pull out a 165 mvp disc and get really good wind results. Because the disc is lighter, you can get the spin rate up, but because of the weight distribution its able to fight the turbulant air better.
So, the calculator most likely is doing the math based on probably some weird data set like 90% of the weight being on the outermost rim of the disc.